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Gas Appliances

Exam revision materials for Plumbing Level 2&3 and ACS Gas Safety test

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Boiler Servicing

Preliminary Checks

  • Check installation conforms to Regulations
  • Light appliance and check correct operation/signs of spillage
  • Check flue and terminal type/position
  • Ensure ventilation is adequate (open flues)
  • Ensure compartment ventilation is suitable (where appropriate)
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Annual Service

  • Isolate gas/electric supplies to appliance
  • Remove outer casing/panels to access burner
  • Remove burner and control assembly
  • Remove burner injector and blow clean
  • Take out pilot/thermocouple/ignition assembly and clean
  • Clean main burner and lint arrestor
  • Take flue cover off and clean flue ways
  • Clean flue ways through clean exchanger
  • Remove all debris from combustion chamber
  • Check conditions of all components and replace if necessary
  • Reassemble the components, checking any gas connections
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  • Re-light boiler as per manufacturer's instructions
  • Check burner pressure as stated on data plate
  • Check gas rate
  • Check operation of flue (open flues require a spillage)
  • Check boiler controls and safety devices are functioning correctly
  • Report back to user with manufacturer's instructions
  • Advise customer of the ongoing need for regular maintenance
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